Paper waxing machine



May 26, 1942. J. BENNETT PAPER WAXING MACHINE Filed Jan. 24, 1940Patented May 26, 1942 UNITED STATES PATENT OFFICE 2,284,553 PAPER wAxiNGMACHINE John Bennett, Passaic, N. J.

Application January 24, 1940, Serial No. 315,411

l 3 Claims.

My invention relates to new and useful improvements in a method of anapparatus for` applying wax to paper.

An important object of my invention is the provision of an apparatus forwaxing paper that provides means for regulating the thickness of thecoating of wax to be applied to the paper.

Another object of my invention is the provision of an apparatus of theabove-mentioned character that is adapted to direct a web of paperthrough a. waxing vat and to thereafter pass the waxed paper through acooling unit in a manner to harden the wax on the paper.

Still another object of my invention is the provision of an apparatus ofthe above-mentioned character that is constructed in a manner wherebyvery little of the web of paper will be unsupported during or betweenany of the waxing operations, thus permitting the paper to travel at arelatively high rate of speed.

Yet another object of my invention is the provision of an apparatus ofthe above-mentioned character that is simple in construction and that isuniquely assembled to promote a rapidand etiicient waxing of the paper.

Other objects and advantages of my invention will be apparent during thecourse of the following description.

In the drawing, forming a part of this specilication, and wherein likenumerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation, showing parts in section, of a deviceembodying my invention,`

Figure 2 is a top plan view, showing parts broken away, of my device,

Figure 3 is a vertical sectional view taken on the line 3-3 of Figure 1,

Figure 4 is a vertical sectional view taken on the line 4-4 of Figure 1,

Figure 5 is a fragmentary vertical sectional view taken on the line 5-5of Figure 2, and

Figure 6 is a vertical sectional view taken on the line 6-6 of Figure 5.

In the accompanying drawing, wherein for the purpose of illustration, isshown a preferred embodiment of my invention, the numeral Ill designatesa supporting framework including upright members Il arranged in arectangular formation, which uprights are connected by spaced' parallellongitudinally extending beams I2 and transversely extending beams I3.The

web of paper I4 is taken from the supply roll I5 in the unwaxed state,passed successively through the waxing vat I6 and and cooling unit l1and thereafter wound upon the winding roll I8. The supply and windingrolls l5 and I8 are provided with axles I9 and 20 which extend inbridging relation to the longitudinal beams I2 at opposite ends of thesupporting framework, which axles are supported thereon by the journals2l and 22.

The waxing vat I6 comprises a box-like recep-` tacle 23 having an opentop and adapted to receive a supply of heated wax 24 through the supplypipe 25. A discharge pipe 26 communicates with the receptacle adjacentthe top thereof throughthe opening 21 in a manner to accurately regulateand control the quantity of wax within the receptacle. The wax whichoveriiows through the opening 21 may be conveyed to a central containerwhere it will again be introduced into-the receptacle 23 through thepipe 25. A steam coil 28 is disposed within the receptacle adjacent thebottom` thereof and includes an entrance pipe 29 and discharge pipe 30.The pipes 29 and 30 may be connected to any suitable steam line in amanner whereby live steam will be continuously caused to ilow .throughthe coil 28 to` heat the wax 24 within the vat. The end 3| of thereceptacle is provided at its opposite sides with upstanding lugs 32 andthe idler roller 33 is journaled therebetween in a manner to support theweb of paper I4.

The web of paper extends from the idler roller 33 below the idler roller34 carried by the arms 35 of the bellcrank levers 36. l Thearms 31 ofthe bellcrank levers are bridged by a`rod 38 the opposite ends of whichare screw-threaded and extend through the arcuate slots 39 in theflanges 4I! extending from the sides of the receptacle 23, Nuts 4I arescrew-threadedly received by the extending ends of the rod 38 in amanner whereby the b ellcrank levers maybe pivoted to position the idlerroller 34 a desired distance below the surface of the wax within thereceptacle. Pivotal movement of the levers will cause the ends of therod 38 to traverse the slots 39 and, upon tightening of the nuts 4I, thelevers will be securely held to position the idler roller at the desireddepth.

The supporting bracket 42 bridges the receptacle 23 and with th'ecrossmember 43 disposed a substantial distance thereabove. The verticallydisposed legs 44 of the bracket extend downwardly at opposite sidesofthe tank and are formed with spaced inturned flanges 45 which denneguideways for the vertically slidable U-shtipedv bracket 46. A rubberroller 41 is journaled between the depending arms of the sliding bracket46 and the opposite ends of the roller shaft extend beyond the legs ofthe supporting bracket 42 through the elongated slots 48 to receive th'ecircular gears 49. The hand-screw 50 is screwthreadedly received by theopening 5| in the cross member of the supporting bracket and the free'end thereof is rotatably connected to the U-shaped sliding bracket 46,whereby rotation thereof will effect raising or lowering of the roller41. The metal roller 52 is journaled within the receptacle23 between theopposite sides thereof and below the rubber roller 41. The extendingends of the roller shaft extend beyond the legs of the supportingbracket 42 and carry circular gears 53 in meshed relation with thecircular gears 49. Y

vThe web of paper extends from the idler rollen 34 between the rollers41 and 52 and the hand- .screw 50 may be actuated to move the rubberroller 41 into pressed engagement with the paper and in a manner to holdthe paper in pressed engagement with the lower metal rollerv 52. Passageof the paper between the rollers will remove the surplus wax therefrom,which waxY will return to the receptacle 23.

It is obvious that very little `vertical adjustment between the rollers41 and 52 will be necessary Yduring the-operation of the apparatus, andsuch adjustment as will be necessary will be relatively slight. Under`no circumstance will it be necessary to move the rubberrollersufficiently to disengage the circular gears 49 and 53.

The cooling unit I1 includes an idler roller 54, which roller is oftubular formation, the ends of the tube being closed and havinglongitudinally extending Shanks 55 supported on the beams I2 of thesupporting framework by the journalsv 56. -A liquid supply conduit 51communicates with one end of the roller through the stuiling box 58, andthe discharge conduit 59 communicates with the opposite end of theroller through the stuiing box 69, whereby a suitable cooling solution6| may be continuously passed through the roller.

` tank, whereby a constant circulation of the so- `pare connected to thepulleys 96 onthe motor 'f The cooling unit I1 also includes anelongated` e cle and is adapted to hold a liquid refrigerant therein. Ablower 80 is supported above4 th'e plate 64 and the "funnel-shaped hood8| extends therefrom and vwith the peripheral edge thereof in slightlyspaced relation with the plate, Whereby the blast of air from .theblower will be directed against the upper surface of the paper in amanner to hold the same in appressed relation with the plate. l Y

An inlet conduit 65 extends from the pump 66 and communicates with thereceptacle adjacent the top plateA 64 at the highest nd thereof. Theinlet pipe 51 extending from the idler roller 54, connects with the pipe65, as illustrated in Figure 2, whereby cooling solutions from the pumpmay f :stretchedove'r the idler roller 92, and as the quanbe forcedsimultaneously through the roller and receptacle. 'I'he supply pipe 69extendsfrom a cooling solution supply tank (not shown) of brine, Y orthe like, to the pump, and the pipe 59, glischarging from the coolingroller 54, has the discharge pipe 1|) leading from the receptacle 62connected thereto. The pipe 59 also communilution by the vpump 66 may beeffected.

The brackets 1| are supported by the longitudinal beams I2 and maintainthe transverse Vroller 12 slightly spaced from the end 68 of the of themotor 18. The Shaft 0f the roller 'l2 is provided with a pulley 82 andthe blowershaft 83 is provided with a pulley 84 whereby the endeJ lessbelt 85, connecting. the pulleys 82 and 84, may impart rotation to theblower. The opposite ends of the shaft of the lower roller 52,

operating in the waxing vat I6, are providedwith pulleys 86, andthe'endless belts 81 are trained thereabout and about` the pulleys'88`carf red at the opposite ends of the shaft ofthe roller 12. Theendless belt 89j connects the pulley 90 of the motor shaft and thepulley 9| ofthe pump, whereby operation of the motor'will impartrotation to the pump to effect the circula# the cooling' f tion of thecoolingv solution Vthrough unit. V-

TheVA web of paper I4 extends from the roller 12 below the idler roller92, journaled between' supporting the longitudinal beams yI2 of theframe, and to the winding roll I8.

The winding roll comprises'a shaft 20 oper- `7 ating within the sleeve94. The opposite ends of the shaft are provided with pulleys which shaftby meansof the endless belts 91. "The `opposite ends of the sleeve 94are formed with drums 98 and the portion of the shaft'2Ilf-exetendingthrough the drums are provided with' a plurality of radially extendingShanks 99Hwhich slidably receive the sleeves |00 of the shoes IOI. Theouter surfaces of the shoes are maintainedl in pressed engagement with`the inner periphery?k of the drums by the coil springs |02 tv effect avfriction drivefor the winding roll.

The friction drive is necessary for the reason that the paper would tendto Wind more rapidlyV around the sleeve 94 as the roll .becomes larger ythereby forcing the web of paper to pass more rapidly through the,waxing vat I6 and cooling unit I1.` The roller 12 will cause the paperto travel at a constant speed and rotation of the-` winding rollwillkeep the portionV of the paper between the roller 12 and the windingroll tautly tity of paper on the winding roll becomes greater,

the springs |02 will permit slippage between the drive shaft k20 and theroll of waxed paper.

The operation of the device is as follows: The paper is rolled from thesupply roll I5 and threaded over the idler roller 32, under ytheVadjustable idler rollers 34, between the rollersv 41` and 52, under thecooling idler roller 54, andover the plate 64 below the hood 8l of theblower. From the plate 64 the paper passes over v.the

drive roller 12 and under the idler roller 92' where it is connected tothe winding roll I8.

The motor 18 will drive `the winding roll to wind the paper evenly andsmoothly thereon. The motor will also drive the pump'66 to effect acontinual flow o f cooling solution through the roller 54 and tank V|2,and the endless beltsv16 catesv with the central cooling.\so1utionsupply 75 fwill drive the vacuum cup roller l12 to -feed the paperthrough the various units at a constant speed. As hereinbefore describedthe idler roller 84 may be adjusted to cause the paper to pass arequisite distance below the surface of the waxing solution therebycausing the same to remain within the wax for a desired period of timein a manner to control the thickness of the layer of wax applied to thepaper. The rubber roller 41 may be adjusted relative to' the metalroller 52 to press the surplus wax from the paper, and passage of thewaxed paper under the roller I will permit the cooling solution thereinto harden the wax on the upper surface of the paper. The lower peripheryof the cooling roller 54 is disposed slightly below the upper surface ofthe plate 64 in a manner to aid in holding the paper in pressed relationto the plate. The current of air generated by the blower B0 will bedirected against the upper surface of the paper as it traverses thechilled plate 8l to dry and harden the wax thereon and to hold the paperin appressed relation with the plate.

The inclined position of the receptacle 62 assures Contact of thecooling solution therein with the bottom surface of the plate 64 at alltimes. The pump 66 is adapted to force the cooling solution continuouslythrough the receptacle 62; however, if the pump should fail to supply aquantity of the solution necessary to maintain the receptacle in afilled condition, the surface of the liquid within the tank would belowered slightly and then only at the elevated end 68. The paper willpass from the plate 64 onto the roller I2 in a substantially dried stateand the friction drive hereinbefore described for the winding roll willassure the smooth even winding of the same about the said roll.

It is to be understood that the form of my invention, herewith shown anddescribed, is to be taken as a preferred example of the same, and thatvarious changes in the size, shape and arrangement of parts may beresorted to without departing from the spirit of my invention, or scopeof the appended claims.

Having thus described my invention, I claim:

1. A machine for waxing paper of the type including a receptacle forheated wax and means for guiding the paper through the receptacle, atank for cooling liquid having an inclined essentially elongated chilledflat top surface over which the bottom side of the waxed paper is drawn,a chilled roller disposed between the wax receptacle and the coolingunit and with the periphery thereof in intimate contact with the uppersurface of the said paper for hardening the wax on the mentioned surfacebefore the same contacts the tank, and means to direct a blast of airagainst the hardened wax on the top surface of the paper to hold thesame pressed against the chilled top surface of the tank.

2. In a combination with machine for waxing paper of the type includinga receptacle for heated wax and means for guiding the paper through thereceptacle, a cooling unit comprising a tank having an inclinedessentially elongated chilled nat top surface over which the bottom sideof the waxed paper is drawn, means to direct a blast of air against thepaper in a manner to hold the same in appressed relation with thechilled surface of the cooling unit, saidV means including a hood havinga discharge opening of substantiallythe same size as the topV surface ofthe tank and the periphery of the hood being arranged in proximity tothe top surface of the paper, and a chilled roller disposed between thewax receptacle and the cooling unit and with the periphery thereof inintimate contact with the upper surface of the said paper for hardeningthe wax on the top surface of the paper before the same is subjected tothe blast of air from the said blower.

3. In a machine having means to coat a web of paper with wax, theimprovement comprising an essentially elongated cooling tank inclinedfrom the horizontal and including a chilled flat top surface adapted tohave an intimate contact with one side of the waxed paper, a rollerdisposed at the end of the cooling tank remote from the waxing means,the periphery of the roller being provided with suction cups adapted togrip the paper and to pull the same across the chilled surface of thetank, means to direct a blast of air against the paper in a manner tohold the same in pressed relation with the chilled surface of thecooling unit, said means including a hood having a discharge opening ofsubstantially the same size as the surface of the tank and the peripheryof the hood being arranged in proximity to the top surface of the paper,and a chilled roller disposed between the wax receptacle and the coolingunit and with the periphery thereof in intimate contact with the uppersurface of the said paper for hardening the wax on the top surface ofthe paper before the same is subjected to the blast of air from the saidblower.

JOHN BENNETT.

